Internal combustion engine for portable machine

Details Internal combustion engine for portable machine Internal combustion engine for portable machine

1982-09-15

1984-02-07

Burns, Wendell E.

Internal-combustion engines

Multiple cylinder

Having rotary output shaft parallel to cylinders

123 56R, 123 56A, 123 56BA, 123 73A, F02B 7524

Patent

active

044296681

ABSTRACT:
A 2-cycle opposed cylinder internal combustion engine of simultaneous ignition type for portable machines such as grass trimmer. Two cylinders are provided at their same sides with intake ports and exhaust ports. In each cylinder, the intake port and the exhaust port are arranged in a side-by-side relation in the direction of axis of the cylinder. Namely, exhaust port which is heated to high temperature is arranged near the intake port which is cooled during the operation of the engine. In consequence, the temperature of the portion around the exhaust port is lowered while the temperature of the portion around the intake port is raised to uniformalize the temperature distribution in the cylinder to eliminate various problems attributable to non-uniform temperature distribution in the cylinder.

REFERENCES:
patent: Re26222 (1967-06-01), Fielder
patent: 1278585 (1918-09-01), Buehner
patent: 1316437 (1919-09-01), Flood
patent: 1424705 (1922-08-01), Abell
patent: 1733361 (1929-10-01), Rice, Jr.
patent: 1814333 (1931-07-01), Parker
patent: 2234455 (1941-03-01), Smith

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